I'm not an expert at fishing by any means. I do it to relax. There's nothing like the sound of water, wildlife all around, and you slowly moving through water with a fly rod and reel trying to entice fish with a fake fly, once a false appearance of the fly is presented, like letting it drag through the water and the fish know it ain't real.
One thing I forgot to mention. When I do fish in states I don't have a license, I fish using barbless hooks. I do this in the remote event I get caught I can explain that I was catching and releasing without damaging the fish with the barbless flies. Not sure if that would work real good, it may prevent my equipment form being confiscated, but I would probably get the fine. You see if you catch the fish to eat your poaching that's what the fine is all about, if your catching and releasing it's not poaching. Not sure how legal that is but it's not poaching.